Combination



a '1 624 788 Aim] 12 1927' R. c. HOFMAISTER I COMBINATION TOOL FiledOct; 27, 1924 INVENTOR WITNESS:

ATTORN EY Patente d'Apr.12,1921, i 3 7 UNITED STATES PATENT' OFFICE, IROBERT C. HOFMAISTER; or ieAR-TLEsvInLE, oKLAHoMA,

v COMBINATJIONYTOOL. I V I Application filed October 27, 1924. SerialNo. 746,187.

This invention relates to combination in-' square, the graduations 14representing the struments or tools and has for an object the degrees ofa circle, while adjustment of the provision of a tool of simpleconstruction member 11 with respect tothe graduations which may be usedas a square, an adjustable 15 will indicate the distance between the 5'tri-square, protractor and divider, as well pointsil6 and 18 in inches.as an ordinary rule. The member llis provided with a plate 19 With theabove and other objects in View, which is adapted, to be placed againstthe the invention further includes the following edge of aboard or othermember B when novel features and details of construction, the instrumentis used as a right angled 10 to be hereinafter more fully described,illusor tri-squa're. I I

trated. in the accompanying drawings and The invention is susceptible ofvarious pointed out in the appended claim. changes in its form,proportions and minor In the drawings details of construction and therightis' Figure 1 is an elevation of the invention. herein reserved tomake such changes as 15 Figure 2 is a section taken substantiallyproperly fall within the scope of the apon'the line 2-2 of Figure 1.pended claim.

Figure 8 is a sectional view showing the Having described the-inventionwhat is v device in use. claimed is v Referring to the drawings indetail where- In combination, a substantially U-shaped in likecharacters of reference denote corremember terminating to providepointed'exsponding parts, the invention is shown as tremities, aperturedlugs projecting from the comprising a pair of memberslO and 11corresponding edges of'the limbs of said which are pivotally connectedtogether as membernear one end thereof, a longituindicated at 12. jdinally disposed plate connecting the said 25 The member 10 is providedat one end edges of the respectivelimbs at a point hewitha'substantiallysemi-circular extension neath. said lugs, .a secondmember having v13 which is arranged concentrically of the one endpointed, and an enlarged'subst-anv pivot 12 and this extension isprovided with tially semi-circular graduated portion arconcentricallyarranged graduations 14C and ranged at the other end thereof and pivoted15. Theopposite end of the member 10 is. between said lugs for; movementbetween pointed as shown at 16. I the limbs above the lugs of the firstmen- The member 11 is bifurcated so as to retioned member, said membersbeing relativeceive the semi-circular portion of the memly adjustabletoward and away from each ber 10, the said member 11 carrying at oneother, and a set screw carried by the closed 1 end a set screw 17 whichisadapted to enend'of the first mentioned memberand argage the edge ofthe semi-circular portion ranged to engage the curved edge of the y 13ofthe member 10 to hold the membersin semi-circular portion of thesecond menadjusted position. The opposite. end of the tioned member, tohold said parts fixed relamember 11, is pointed'as indicated at 18.tively in adjustedposition. j 3 i 40 By adjusting the member llwithrespect In testimony whereof I afiix my signato the graduati'ons 14:,the tool may be used ture. f as a protractor, or as an adjustable 'tri-ROBERT C. HOFMAISTER. I

